So, I bought our newpriusbattery.com solution recently. Timely shipment, showed exactly as I anticipated. Bit of an effort replacing the modules, all of which was because the weather in PDX at the time was too ff-ing hot. Instead of one day is was three partial efforts. If you do more than one I suspect that four hours might well be achievable. We didn't spend much more than 4h honestly, we just spread it over three days. Finally mileage is back to normal. Unable to get a decent freeway rating because I haven't driven any distance on a freeway. Drove to the coast, which maintained 41mpg with A/C and uphill, downhill, traffic, passing lanes. I do have a stack of old modules that might be of assistance to someone in the PDX area. I also have the Prolong charger and dischargers. They aren't recommended by NPB, at least not until the battery show significant aging.
Congrats on your new pack install... I sent a private message about your old gear... Hope to talk to you soon!